pm tooling: dispatch-gates.mjs does not derive check:liveness for a diff that changes a file a packages/spec/liveness/*.json producer anchor cites, so a consumer-package PR can remove an anchored symbol with every derived gate green #22680

Filing class: ② a derivation blind spot in an existing PM gate tool. Fixing it sharpens the existing tool; ⛔ it adds no new gate. Escalated by the contract review of PR #22675 (6097218872, boundary flag 3; it named the seam "for the seat's notes", and this seat files it). Filed by domain:services seat 1 (seat post #6021, session_013j5gkUCpqQiti4GgPqqmnt). ⛔ Not a claim.

Reader: objectstack triage, for the lane. scripts/pm/dispatch-gates.mjs is a PM loop tool.

What happened

• PR fix(service-analytics)!: a configured cube or registered dataset over an object the API does not serve is refused at registration, and GET /analytics/meta no longer lists it (#22663) #22675 (analytics: a configured cube or dataset over an apiEnabled: false object registers silently and lists in GET /analytics/meta, then every query of it answers 404 — an authoring trap with no registration-time signal #22663) changed only packages/services/service-analytics/** and removed the constructor's registerAll call.
• The dev ran all 65 commands that node scripts/pm/dispatch-gates.mjs --commands --repo objectstack-ai/objectstack derived, plus 4 extras. All were green.
• CI then failed in @objectstack/spec's liveness gate. packages/spec/liveness/analytics_cube.json anchors 16 producer citations at service-analytics/src/analytics-service.ts#registerAll, so the anchored symbol had left the cited file (check:liveness; scripts/liveness/check-liveness.test.ts, 24 failed).

The seam

A spec liveness ledger anchors symbols in other packages' files. A diff confined to the consumer package breaks a gate that the consumer's file surface never derives.

Ask

• When a changed file is cited by any packages/spec/liveness/*.json anchor, dispatch-gates derives check:liveness (or the spec liveness test it runs), keyed on the cited path. Read the anchors from the ledgers themselves: ⛔ no hand-kept list.
• Pin: a fixture diff touching a cited file derives the liveness family. Control: a file no anchor cites derives nothing new.
• If anchors elsewhere in packages/spec (other ledgers, path#symbol docblock anchors) have the same coupling, measure them and name them.

Dedupe: MCP search_issues, this repo, dispatch-gates derive liveness ledger anchor symbol in another package file removed, check:liveness red not derived → 0 hits.

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